<template>
    <div class="auth-page">
        <div class="container page">
            <div class="row">

            <div class="col-md-6 offset-md-3 col-xs-12">
                <h1 class="text-xs-center">{{ isLogin ? 'Sign In' : 'Sign up'}}</h1>
                <p class="text-xs-center">
                <nuxt-link v-if="!isLogin" to="/login">Have an account?</nuxt-link>
                <nuxt-link v-if="isLogin" to="/register">Need an account?</nuxt-link>
                </p>

                <ul class="error-messages">
                    <template 
                        v-for="(messages, field) in errors"
                    >
                        <li v-for="(message, index) in messages" :key="index">
                            {{field}} {{ message }}
                        </li>
                    </template>
                </ul>

                <form @submit.prevent="onSubmit">
                <fieldset v-if="!isLogin" class="form-group">
                    <input v-model="user.username" class="form-control form-control-lg" type="text" placeholder="Your Name" required>
                </fieldset>
                <fieldset class="form-group">
                    <input v-model="user.email" class="form-control form-control-lg" type="email" placeholder="Email" required>
                </fieldset>
                <fieldset class="form-group">
                    <input v-model="user.password" class="form-control form-control-lg" type="password" placeholder="Password" required minlength="8">
                </fieldset>
                <button class="btn btn-lg btn-primary pull-xs-right">
                    {{ isLogin ? 'Sign In' : 'Sign up'}}
                </button>
                </form>
            </div>

            </div>
        </div>
    </div>
</template>

<script>
import { login, register } from '@/api/user'
// 仅在客户端加载js-cookie包
const Cookie = process.client ? require('js-cookie') : undefined

export default {
    middleware: 'noAuthenticated',
    name: 'LoginIndex',
    computed: {
        isLogin() {
            return this.$route.name === 'login'
        }
    },
    data() {
        return {
            user: {
                username: '',
                email: '',
                password: ''
            },
            errors: {} // 错误信息
        }
    },
    methods: {
        async onSubmit() {
            try {
                // 提交表单请求登录方法
                const { data } = this.isLogin ? await login({user: this.user}) : await register({user: this.user})
                // TODO: 保存用户登录状态
                this.$store.commit('setUser', data.user)
                // 持久化登录态
                Cookie.set('user', data.user)

                this.$router.push('/')
            } catch(err) {
                this.errors = err.response.data.errors
            }
        }
    }
}
</script>

<style>

</style>